Pressure-regulator and cut-off



(No Model.)

G. WESTINGHOUSE, Jr.

PRESSURE REGULATOR AND GUT-OEE.

Patented Aug. 25. 1885.

WITNESSES:

INVENTOR.

WC/Ff ATTORNEY.

IOl

tra TATES GEORGE /VESTINGHOUSE, JR., OF PITTSBURG, PENNSYLVANIA.

PRESSU PLE-REGU LATOR AN D CUT-OFF.

SPECIFICATION forming part of Letters Patent No. 324,905, dated August25, 1885.

(No model.)

To all whom, it may concern.-

Be it known that I, GEORGE Wns'ruve- HOUSE, J r., residing at Pittsburg,in the county of Allegheny and State of Pennsylvania, a citizen of theUnited States, have invented or discovered certain new and usefulImprovements in Pressure Regulators and Out-Otis, of which improvementsthe following is a specification.

In the accompanying drawings, which make part of this specilication,Figure 1 is a vertical central section, at the line x x, of Fig. 2, of apressure-regulator and cut-offembodying my invention; and Fig. 2, aview, partly in plan and partly in horizontal section, at the line y yof Fig. 1.

My present invention is an improvement upon that for which LettersPatent of the United States No. 312,543 were granted and issued to meunder date-of February 17, 1885, and its objects are to simplify andeconomize the construction of the apparatus and provide improvedfacilities for obviating undue Vibration of the movable abutment andreducing tendency to breakage of its stem, for maintaining the closureof the regulating-valve during the cessation of supply, and effecting aresumption of supply when required, and for limiting to a determinedmaximum the quantity of tlnid that will be permitted to pass into thedelivery-pipe.

To these ends my invention consists in certain novel devices andcombinations hereinafter fully set forth. v

1n the practice of my invention I provide a valve-casing, 1, which isconnected by bolts 10, passing through a iange at one of its ends toapressure-chamber, 2, with which the valvecasing communicates through aseries of openings, 3,in a cap extending across its end nearest thechamber, and apassage, 6, in the wall of the pressure-chamber. A iiangeor nozzle, 21, is formed upon or connected to the end of the valvecasing farthest from the pressurechamber, for the attachment of a pipeleading from a main or other source ofhigher pressuresupply of gas orother fluid, and a liange or coupling-piece, 22 for the attachment of adelivery-pipe, is connected to a delivery-nozzle, 7, on the side of thevalve-casing. A doublebeat regulating and cnt-off valve, 34, composedoftwo disks of substantially equal diameters, so as to be in equilibriumof pressure, is secured upon a stem, 36, passing through a long guide,23, in the valve-chest, into the pressure-chamber 2, the disks of thevalve being adapted to seat ou opposite sides, respectively, ofapartition, 35, extending across the valve-chest between its supply anddelivery openings, and being located at such distance apartupon theirstem, as to permit, when both are raised equally from their seats, thepassage of the maximum quantity of llnid required to be supplied to thedelivery-pipe. The pressure chamber 2 is, as in my Letters Patent No.312,543, before referred to, iitted with a movable abut-ment, adapted tobe actuated in one direction--to wit, upwardly-by the pressure of fluidentering the chamber through the openings 3 and passage 6, and in theother by a spring or weight, and is composed of a tiexible diaphragm,l5, and a gravitating pressure-plate, 20. The diaphragm 15 is secured atand adjacent to its periphery between a flange, 16, projecting aroundthe top ofthe pressure-chamber 2, and a cap or Pressure of iiuidentering the chamber through the openings 3 and passage 6 will tend toelevate the diaphragm 15 and pressure-plate 20, acting against thedownward tendency of the gravity ot' the plate and maintaining theabutment in position horizontally or effecting its elevation,respectively, according as it may be sufficient in dethrough thediaphragm and pressure-plate and through a long sleeve or boss, 24,projecting centrally from the upper side of the pressure plate andfitting in a central guidesocket, 31, on the cap 17. The stem 2t) iscaused to follow the movements of the diaphragm and pressure-platewithin their range cover, 17, secured by bolts 18 to the tlange grec tobalance or to overcome the action of IOO under normal pressure by theresistance of a sprn g, 40, interposed between the upper end ofthe boss24 and a stop-nut, 41, tixed on the end ofthe stem 29. The lower end ofthe stem 29 is coupled to the longer arm ot' a bell-crank lever, 32,which may be formed ot' two plates, as shown, the shorter arm of whichlever is pivoted to a bearing, 33, on the inside ot' thepressure-chamber 2,4 adjacent to the point at which the valve-easing 1is connected thereto. The stem 36 of the regulating and cut-off valvepasses freely through the wall ot the pressure-chamber 2, and is coupledto the bell crank lever 32 by a pin, 37, tting slotted holes formed inthe lever at the junction ot' its arms. A helical spring, 25,surrounding the valve-stein 36 and bearing at its ends against ashoulder thereon and against the ixed guide 23, may be inserted for thepurpose of compensating for wear and lost motion in the connectionsofthe abumentstem. It will be seen that both the downward and the upwardmovements of the diaphragm and pressure-pla. te will effect the openingand the closure of the regulating and cut-oft' valve 34, in accordancewith and proportionately to variations of pressure in the fluid enteringthe chamber 2 through the openings 3 and passage 6, the maximum supplyof uid to the delivery-pipe being afforded when both disks of the valvestand at equal distances from their seats, and the same being diminishedor wholly cut oit' as one or the other disk approaches or abuts againstits seat. Assuming the disks to be at equal distances from their seats,as above stated, excess of pressure will raise the diaphragm andpressureplate, and, through the stem 29 and bell-crank lever 32, movethe valve-stem 36 to the left, diminishing to the required degree theflow of iiuid by the right-hand disk of the valve, and under subsequentdiminution of pressurethe gravity ofthe pressure-plate will move thestem 36 to the right and correspondingly increase, as required, the areafor the passage of iiuid through the opening governed by the right-handdisk. Upon the cessation ofiiuidsupply, or the diminution thereof belowthe degree suicient to support combustion at the burners, the movementof the stem 36 to the right, effected by the gravity ofthepressureplate, will bring the left-hand disk'of the valve 34 to itsseatand thereby cut oft' the supply of fluid to the delivery-nozzle 7and its connected delivery-pipe.

In order to admit otthe renewal ofthe supply of Huid after having beencut off as above described, a bypass valve, 8, is ttted to a seat at theouter end ot' a small passage, 5, leading from the chamber ot' thevalveSto the space between the disks of the regulating and cut-ottlvalve 34, said chamber communieating with the supply-nozzle 2l by acorresponding small passage, 4. The valve 8 is secured upon a stem, 9,passing approximately gas tight through a long guide in the cap 1l ofits chamber, and having a hand-piece, 12, upon its outer end, and isheld to its seat by a spring, 14. The outer end of the valvestem 9 isinclosed by a tight cap, 13, by the removal of which the by-pass valvemay be raised from its seat and held open until a suficient quantityofluid has passed through the openings 4 and 5, and the opening governedby the right-hand disk of the valve 34, and thence to thepressure-chamber,'to raise the diaphragm and pressure-plate, and therebyto move the left-hand disk from its seat and eiiect a resumption of thesupply, after which the by-pass valve is released and seated by itsspring l4,tl1c cap replaced, and the operation of the appara-tuscontinues, as before described.

'lo enable excess of pressure in the chamber 2 to be relieved if undulyhigh, a series ot' openings, 38, is formed in the diaphragm l5, adjacentto its center, said openings register'- ing with corresponding passages39 in thel pressure-plate, and being normally closed to the fluid in thechamber 2 bythe plate 30. Upon the existence of an excess of pressure inthe chamber 2 the upward movement of the diaphragm 15 will rst seat theright-hand disk of the regulating-valve and further upward movement ot'the stem 29, and plate 30, being prevented by the bearing of said diskagainst its seat, the continued movement of the diaphragm and plate 2()withdraws the openings 38 from the plate 30, and the tuid in thepressure-chamber will escape through said openings and the passages 39into the space between the diaphragm and cap 17, from which it may beled through a pipe connected to an opening, 42, in the cap to anysuitable point of discharge.

In order to prevent jarring or vibratory m0- tion of the pressure-plateand diaphragm under sudden and frequent variations of pressure, acheck-valve, 43, having aminute opening, 44, for the passage of air, isfitted over the opening 42, so as to admit ofthe constant application ofatmospheric pressure above the diaphragm and the release thereof asrequired by its movements.

For the irpose ot" limiting the delivery capacity of the regulator to adesired ldetermined maximum, a deliverycheck-plug, 45, having one ormore openings or passages, 46, of proper area to admit ot' the deliveryofthe desired maximum quantity of iuid, may be inserted in thedelivery-nozzle 22, and the capacity of delivery may be increased ordiminished as required by opening more or less of said passages, or bythe substitution of a plug having greater or less delivery area.

I claim herein as my inventionl. The combination lot' a valvecasing hav-IOO IIO

ing supply and delivery passages, a regulating and cut-off valvecomposed ot' two disks fixed upon a common stem in such relation thateither disk is titted to govern independently of the other, auopening ina partition in thc "valve-casii-ig between its supply and deliverypassages, a by-pass valve governing a passage establishing iuidcommunication from the space between the disks ofthe regulating andcut-oli' valve to the supply-passage of the Valve-casing, apressure-chamber comm n nicating with the valve-easing on the deliveryside of the partition, and a movable abutment Working in said chamberand coupled to the stem of the regulating'and cutott` valve, subsiantially as set forth.

2. The combination of a pressurechainber, a flexible diaphragm securedperipherally thereto, a pressure-mate resting on said Vdiaphragm andhaving a central sleeve or boss ttin g a guide-socket in the cap of thepressnreeha-mber, a stem passing freely through said sleeve or boss andcarrying aplate which closes an opening or openings in the diaphragm andpressure-plate, a spring bearing against a shoulder on the stem andagainst said sleeve or boss, and a valve governing communication betweensupply and delivery ljiassages in a casing communicating with thepressure-chamber, and coupled to the stem of the diaphragm andpressureplate, substantially as set forth.

3. The combination ot' a pressure-chamber, a movable abutment Workingtherein, a cap or cover closing said chamber, adischargepassage leadingout ot' said cap, anda checkvalve governing said passage, and providedwith a small opening for the passage of air, substantially as set forth.

4. The combination of a valve-easing, a 'valve governing communicationbetween supply and delivery passages therein, a movable abutment working in a pressure chamber communicating with the valveoasin g and coupledto the stem of said valve, and a perforated delivery check-plug insertedin the delivery passage of the valvecasing, substantially as set forth.

In testimony whereof' I have hereunto set my hand.

G EO. .W ESTINGHOUSE, JR

Titnesses z.

J. SNOWDEN BELL, It. H. WHrr'rLEsnY.

